Automatic sample milling machine small sample clamp easy to disassemble and assemble
By designing an easy-to-disassemble small sample fixture for an automatic milling machine, and employing a positioning pin and hole clearance fit and a matrix-style workstation, the problem of clamping small-sized samples was solved, achieving high-precision machining and efficient production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHALCO SHANXI NEW MATERIAL CO LTD
- Filing Date
- 2025-05-14
- Publication Date
- 2026-05-26
AI Technical Summary
Existing automatic milling machine fixtures cannot effectively hold small-sized samples, resulting in low machining accuracy and frequent disassembly and assembly, which affects production efficiency.
Design an easy-to-disassemble automatic milling machine small sample fixture. The fixture uses a gap fit between the positioning pin and the positioning hole to achieve coplanar positioning of the small sample. Combined with a matrix station design and a detachable connection structure, it is suitable for processing small samples with a diameter of 20-35mm.
It achieves high-precision coplanar positioning of small samples, improves processing efficiency, reduces equipment maintenance costs, and expands the application scope of automatic milling machines.
Smart Images
Figure CN224274115U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of machining technology, and in particular to a small sample fixture for an automatic milling machine that is easy to disassemble and assemble. Background Technology
[0002] Automatic milling machines are key equipment for sample surface processing in the metallurgical and casting industries. They are mainly used for milling the surfaces of metal samples to meet the requirements of surface smoothness and flatness for spectral analysis or low-magnification microstructure analysis. Existing automatic milling machines commonly used in production come with their own fixtures, which are typically designed to meet the processing needs of standard samples with a diameter or side length of 80-300 mm.
[0003] However, with the increasing sophistication of production processes, the demand for testing small-sized samples (typically 20-35mm in diameter), such as primary aluminum samples and furnace samples, is growing. Existing automatic milling machines have the following problems with their fixtures: First, the slot size is only suitable for larger standard samples, resulting in poor compatibility with the clamping surfaces of small samples and an inability to form effective clamping, leading to sample displacement or even detachment during milling; second, it is difficult to maintain coplanar positioning of the sample surface, affecting milling accuracy; and third, frequent disassembly and replacement of specialized fixtures increases equipment downtime, severely impacting production efficiency. These factors limit the application scope of automatic milling machines. Utility Model Content
[0004] To address the problems existing in the prior art, this utility model provides an easily detachable small sample fixture for an automatic milling machine, which aims to enable surface processing of small samples such as original aluminum samples and furnace samples with a diameter of 20-35mm without affecting existing usage conditions, thereby expanding the application range of the automatic milling machine.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] A small sample fixture for an automatic milling machine that is easy to assemble and disassemble includes a fixture body and a positioning plate. The fixture body includes a fixture base plate, two fixed fixture frame blocks, a fixed fixture middle block, and multiple movable fixture blocks. The fixed fixture frame blocks are respectively disposed on the left and right sides of the fixture base plate, the fixed fixture middle block is disposed in the middle of the fixture base plate, and the multiple movable fixture blocks are disposed between the fixed fixture frame blocks and the fixed fixture middle block. The fixed fixture middle block and the corresponding movable fixture blocks have concave and convex structures on their opposite side surfaces, which cooperate to form multiple receiving parts. The fixture base plate has multiple hollow parts, which correspond to the receiving parts in position. Multiple fastening bolts are inserted from the outside of the fixed fixture frame blocks and press the corresponding movable fixture blocks. The positioning plate is detachably connected to the fixture body, wherein the positioning plate has multiple positioning pins vertically disposed on it, and the positioning pins are inserted into mating holes on the fixture base plate.
[0007] Preferably, the processing station consists of eight circular grooves arranged in a 2×4 matrix.
[0008] Preferably, the processing station consists of sixteen circular grooves arranged in a 4×4 matrix.
[0009] Preferably, the fixture base plate and the fixed fixture frame block are made of aluminum or aluminum alloy, and the fixed fixture middle block, the movable fixture block and the positioning plate are made of stainless steel or cast iron.
[0010] Preferably, the mating holes are located at the four corners of the edge of the fixture base plate and form a clearance fit with the locating pins.
[0011] Preferably, the surface flatness tolerance of the positioning plate is within 0.05 mm.
[0012] Preferably, the positioning plate and the positioning pin are connected separately, wherein the positioning plate is provided with four positioning blind holes of equal depth, and the positioning pin is inserted into the positioning blind holes.
[0013] Preferably, the positioning plate and the positioning pin are integrally welded together.
[0014] Preferably, the positioning blind hole is a light hole, and the end of the positioning pin is provided with a tapered guide.
[0015] Compared with existing technologies, this utility model has the following advantages: It achieves coplanar positioning of the small sample processing surface through the clearance fit between the positioning pin and the positioning hole group, effectively solving the problem of flatness deviation during small sample clamping; the matrix-distributed multiple processing stations improve the efficiency of single processing; the compatibility design of the fixture body with existing equipment eliminates the need to modify the milling machine structure, significantly expanding the equipment's applicability. The quick-assembly and disassembly characteristics of the positioning plate further reduce maintenance costs, offering a comprehensive advantage of compact structure, convenient operation, and high positioning accuracy. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the pre-positioning assembly structure of the fixture of this utility model;
[0017] Figure 2 This is a schematic diagram of the clamping structure between the fixture and the sample of this utility model;
[0018] Figure 3 This is a front view of the clamping structure of the fixture and sample of this utility model;
[0019] Figure 4 This is a top view of the clamping structure of the fixture and sample of this utility model.
[0020] Explanation of reference numerals in the attached drawings: 1. Fixture body; 1-1. Fixture base plate; 1-2. Fixed fixture frame block; 1-3. Fixed fixture middle block; 1-4. Movable fixture block; 2. Fastening bolt; 3. Positioning plate; 4. Positioning pin; 5. Receiving part; 6. Hollowed-out part; 7. Mating hole; 8. Sample surface to be processed. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] Example 1
[0023] A small sample fixture for an easy-to-assemble and disassemble automatic milling machine includes a fixture body 1 and a positioning plate 3. The fixture body 1 consists of a fixture base plate 1-1, two fixed fixture side blocks 1-2, a fixed fixture middle block 1-3, and multiple movable fixture blocks 1-4. The fixed fixture side blocks 1-2 are respectively located on the left and right sides of the fixture base plate 1-1, the fixed fixture middle block 1-3 is located in the middle of the fixture base plate 1-1, and the multiple movable fixture blocks 1-4 are located between the fixed fixture side blocks 1-2 and the fixed fixture middle block 1-3. The opposite sides of the fixed fixture middle block 1-3 and the corresponding movable fixture blocks 1-4 are provided with concave and convex structures, which are aligned with each other. The fixture consists of eight circular grooves 5 arranged in a 2×4 matrix to accommodate the sample. Each circular groove 5 has a diameter adapted to the sample workpiece size of 25-35mm. The fixture base plate 1-1 has four hollowed-out parts 6 that correspond to the circular grooves 5 in position, allowing the sample to pass through the hollowed-out parts and be placed in the accommodating part 5. Multiple fastening bolts 2 are inserted from the outside of the fixed fixture frame block 1-2 and press the corresponding movable fixture block 1-4 to achieve sample clamping. Multiple positioning pins 4 are vertically provided on the positioning plate 3. The positioning pins 4 are inserted into the mating holes 7 at the four corner edges of the fixture base plate 1-1 to form a clearance fit, realizing the detachable connection between the positioning plate 3 and the fixture body 1.
[0024] Among them, the fixture base plate 1-1 and the fixed fixture frame block 1-2 are made of aluminum or aluminum alloy, the fixed fixture middle block 1-3, the movable fixture block 1-4 and the positioning plate 3 are made of stainless steel or cast iron; the surface flatness tolerance of the positioning plate 3 is within 0.1mm; the positioning plate 3 and the positioning pin 4 are connected separately, and the positioning plate 3 is provided with four positioning blind holes of equal depth. The positioning pin 4 with a tapered guide is vertically installed on the positioning plate 3 through the positioning blind holes, and the diameter of the positioning blind hole and the positioning pin 4 forms a clearance fit.
[0025] The working principle is as follows: When processing small samples such as original aluminum samples and furnace samples with a diameter of 25-35mm, the operator first flips the fixture body 1 upside down onto the surface of the positioning plate 3, so that the end of the positioning pin 4 is inserted into the mating hole 7 of the fixture to complete the pre-positioning. Then, the sample to be processed 8 is placed face down in the receiving part 5 and on the surface of the positioning plate through the hollow part 6 of the fixture base plate 1-1, and the fastening bolt 2 is tightened to fix the sample. After the sample is loaded, the fixture body 1 and the positioning plate 3 are flipped back to the upright position. At this time, the surface of the positioning plate 3 keeps the surfaces 8 to be processed of all small samples coplanar. Finally, the positioning plate 3 and the positioning pin 4 are removed, and the fixture body 1 with the small sample clamped is placed in the clamping slot of the original fixture. The cylinder of the automatic milling machine makes the original fixture abut against the opposite sides of the fixture base plate 1-1, realizing the rapid nesting and fixing of the old and new fixtures. The equipment can then be started for batch milling. After the work is completed, simply loosen the clamping mechanism of the existing fixture to remove the entire small sample fixture along with the processed sample.
[0026] Example 2
[0027] A small sample fixture for an easy-to-assemble and disassemble automatic milling machine includes a fixture body 1 and a positioning plate 3. The fixture body 1 consists of a fixture base plate 1-1, two fixed fixture side blocks 1-2, a fixed fixture middle block 1-3, and multiple movable fixture blocks 1-4. The fixed fixture side blocks 1-2 are respectively located on the left and right sides of the fixture base plate 1-1, the fixed fixture middle block 1-3 is located in the middle of the fixture base plate 1-1, and the multiple movable fixture blocks 1-4 are located between the fixed fixture side blocks 1-2 and the fixed fixture middle block 1-3. The opposite sides of the fixed fixture middle block 1-3 and the corresponding movable fixture blocks 1-4 are provided with concave and convex structures, which cooperate to form... The fixture has sixteen circular grooves 5 arranged in a 4×4 matrix to accommodate samples, with each groove 5 having a diameter suitable for sample workpieces of 25-35mm. The fixture base plate 1-1 has a hollowed-out portion 6 that corresponds to the circular grooves 5 in position, allowing the sample to pass through the hollowed-out portion and be placed in the accommodating portion 5 on the surface of the positioning plate. Multiple fastening bolts 2 are inserted from the outside of the fixed fixture frame block 1-2 and press against the corresponding movable fixture block 1-4 to achieve sample clamping. The positioning plate 3 has multiple positioning pins 4 vertically arranged, which are inserted into the mating holes 7 at the four corner edges of the fixture base plate 1-1 to form a clearance fit, thereby achieving a detachable connection between the positioning plate 3 and the fixture body 1.
[0028] Among them, the fixture base plate 1-1 and the fixed fixture frame block 1-2 are made of aluminum or aluminum alloy, the fixed fixture middle block 1-3, the movable fixture block 1-4 and the positioning plate 3 are made of stainless steel or cast iron; the surface flatness tolerance of the positioning plate 3 is within 0.05mm; the positioning plate 3 and the positioning pin 4 are integrally welded together.
[0029] The working principle of this embodiment is the same as that of Embodiment 1, and will not be repeated here.
[0030] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or substitute or modify some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A small sample fixture for an easy-to-assemble and disassemble automatic milling machine, characterized in that, The fixture includes a fixture body (1) and a positioning plate (3). The fixture body (1) includes a fixture base plate (1-1), two fixed fixture frame blocks (1-2), a fixed fixture middle block (1-3), and multiple movable fixture blocks (1-4). The fixed fixture frame blocks (1-2) are respectively disposed on the left and right sides of the fixture base plate (1-1), the fixed fixture middle block (1-3) is disposed in the middle of the fixture base plate (1-1), and the multiple movable fixture blocks (1-4) are disposed between the fixed fixture frame blocks (1-2) and the fixed fixture middle block (1-3). The fixed fixture middle block (1-3) and the corresponding movable fixture blocks (1-4) are positioned at the center of the fixture base plate (1-1). The moving clamp block (1-4) has a concave-convex structure on its opposite side surface, and the concave-convex structure cooperates to form a plurality of receiving parts (5); the clamp base plate (1-1) has a plurality of hollow parts (6), and the hollow parts (6) correspond to the receiving parts (5) in position; a plurality of fastening bolts (2) are inserted from the outside of the fixed clamp frame block (1-2) and press the corresponding moving clamp block (1-4); the positioning plate (3) is detachably connected to the clamp body (1), wherein the positioning plate (3) is vertically provided with a plurality of positioning pins (4), and the positioning pins (4) are inserted into the mating holes (7) on the clamp base plate (1-1).
2. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The receiving part (5) consists of eight circular grooves arranged in a 2×4 matrix.
3. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The receiving part (5) consists of sixteen circular grooves arranged in a 4×4 matrix.
4. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The fixture base plate (1-1) and the fixed fixture frame block (1-2) are made of aluminum or aluminum alloy, while the fixed fixture middle block (1-3), the movable fixture block (1-4), and the positioning plate (3) are made of stainless steel or cast iron.
5. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The mating hole (7) is located at the four corners of the edge of the fixture base plate (1-1) and forms a clearance fit with the positioning pin (4).
6. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The surface flatness tolerance of the positioning plate (3) is within 0.1 mm.
7. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The positioning plate (3) and the positioning pin (4) are connected separately. The positioning plate (3) has four positioning blind holes of equal depth, and the positioning pin (4) is inserted into the positioning blind holes.
8. The small sample fixture for an automatic milling machine according to claim 1, characterized in that, The positioning plate (3) and the positioning pin (4) are integrally welded together.
9. The small sample fixture for an automatic milling machine according to claim 7, characterized in that, The positioning blind hole is a light hole, and the end of the positioning pin (4) is provided with a tapered guide.